SWEET Ontology
type: Ontology
version info: 2.3
imports: prop.owl
imports: propQuantity.owl
imports: propPressure.owl
imports: relaSci.owl
imports: relaChemical.owl
imports: relaTime.owl
imports: rela.owl
imports: reprTimeSeason.owl
imports: propFunction.owl
imports: propSpaceHeight.owl
imports: statePhysical.owl
imports: reprSciUnits.owl
imports: matrWater.owl

PrecipitableWater
type: Class
subclass of: WaterContent
comment: The total atmospheric water vapor contained in a vertical column of unit cross-sectional area extending between any two specified levels.

SnowCover
type: Class
subclass of: Thickness
subclass of: Restriction
  on property: hasSubstance
  all values from: Snow
comment: The depth of snow that has fallen.

OpticalDepth
type: Class
subclass of: RadiationMediumInteractionQuantity
equivalent class: OpticalThickness
subclass of: Restriction
  has value: dimensionlessUnit
  on property: hasDefaultUnit
comment: The optical thickness measured vertically above some given altitude. Optical depth is dimensionless and may be used to specify many different radiative characteristics of the atmosphere.